The hooded front sight is not good for woods hunting or poor light, though a dandy for targets, primarily whitish paper. My 38-55 (TM) Hunter has the front replaced with a small gold bead and I have the same BC type sight you plan on. You might consider the nicer rear peeps as an upgrade, too. Some prefer a white bead or even the 'glow worm' fiber optics, and when I tried a lime green one I was surprised how well I did for a sight that seems to glow so big. FWIW, I did not try squirrel hunting with one, but was hitting little silhouettes about squirrel head size on out to 25ish yds. and pretty small groups on paper.
I have used a gold bead for so long it is a natural for me, a white bead was worthless in the snow or on a light colored target, I just cant get a sight picture until it is on a dark background. The gold bead has just a little glow, but it too can get lost in some color, like fall leaves. If you dont mind a modern look that glow worm might be the ticket.
Either way, what you want is a base (as mentioned, the William's Shorty is one good one) to screw onto the barrel in place of the stock blade that will take the nominal 3/8 dovetail of replacement sights.
